Chicken or the egg... or the talented junior?

I was reading an article about the upcoming draft that listed who is probably staying, leaving or undecided. The article which was on ESPN's site, but now I can't find said they are expecting a record number of underclassmen to enter the draft. It cited two main reasons. The first, is the rookie cap expected in the near future. "The second factor is a marginally talented senior class. Most underclassmen are aware of the competition at their respective positions and have some idea where they stack up in relation." It seems like that statement: "marginally talented senior class" or something like that gets batted around every year. Seriously, I would venture to say that 3 out of 4 senior classes have marginal number of talented or high-profile prospects. But what else should we expect when 25-50 of the top underclassmen bail for the NFL each year?! Of course there are less seniors to choose from because 1/4 - 1/2 of the really good ones left a year or two ago. So stop blaming the seniors and blame their peers who cut and ran... for the money.